Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Nomeie o distrito para Matthew Clay.
 ###Tabelas: CREATE TABLE  (_id AUTO_INCREMENT PRIMARY KEY, District VARCHAR, Incumbent VARCHAR, Party VARCHAR, First elected VARCHAR, Result VARCHAR, Candidates VARCHAR) CREATE TABLE ohio_counties_ranked_by_per_capita_income (ohio_counties_ranked_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT) CREATE TABLE a-link_express (a-link_express_id AUTO_INCREMENT PRIMARY KEY, Model VARCHAR, Codename VARCHAR, Released VARCHAR, Fab ( nm ) INT, SATA VARCHAR, USB 2.0+1.1 VARCHAR, USB 3.0 VARCHAR, Parallel ATA 1 VARCHAR, RAID INT, Gb Ethernet MAC VARCHAR, Package VARCHAR, TDP ( W ) INT) CREATE TABLE champions_tour_wins_45 (champions_tour_wins_45_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Tournament VARCHAR, Winning score VARCHAR, Margin of victory VARCHAR, Runner(s)-up VARCHAR) CREATE TABLE grand_slam_tournament_performance_timeline (grand_slam_tournament_performance_timeline_id AUTO_INCREMENT PRIMARY KEY, Tournament VARCHAR, 2003 VARCHAR, 2004 VARCHAR, 2005 VARCHAR, 2006 VARCHAR, 2007 VARCHAR, 2008 VARCHAR, 2009 VARCHAR, 2010 VARCHAR, 2011 VARCHAR, 2012 VARCHAR, 2013 VARCHAR, Win % INT)  
SELECT District FROM  WHERE Incumbent = Matthew Clay